<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        div.box {
            margin: 100px auto;
            width: 100px;
            height: 100px;
            background-color: #ff5700;
            line-height: 100px;
            text-align: center;
            color: #fff;
            transform: rotate(0deg) scale(1);
            float: left;
            margin-left: 200px;
        }

        div.box2 {
            transform: rotate(45deg);
        }
        div.box3 {
            transform: scale(2, 1) rotate(45deg);
        }
    </style>
</head>
<body>
    <div class="box box1">原始</div>
    <div class="box box2">旋转45度</div>
    <div class="box box3">x轴再拉伸2倍</div>
</body>
</html>